123022021 has 8 divisors (see below), whose sum is σ = 125352000. Its totient is φ = 120735004.

The previous prime is 123022007. The next prime is 123022037. The reversal of 123022021 is 120220321.

It is not a de Polignac number, because 123022021 - 2⁵ = 123021989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123021992 and 123022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123022051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205080 + ... + 205678.

It is an arithmetic number, because the mean of its divisors is an integer number (15669000).

Almost surely, 2^123022021 is an apocalyptic number.

It is an amenable number.

123022021 is a deficient number, since it is larger than the sum of its proper divisors (2329979).

123022021 is an frugal number, since it uses more digits than its factorization.

123022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 123022021 is about 11091.5292453295. The cubic root of 123022021 is about 497.3486603129.

Adding to 123022021 its reverse (120220321), we get a palindrome (243242342).

The spelling of 123022021 in words is "one hundred twenty-three million, twenty-two thousand, twenty-one".